Genus native of the province of Yungas, La Paz, Bolivia, where it was first found.
Monotypic genus of shrubby to treelike plants, branched, columnar, 4-5 m in height, ribs 6-10, little marked, straight, weakly tuberculate and transversely grooved over the areoles. 4-12 spines, centrals and radiais not differentiated, short and aciculate.
Flowers nocturnal remaining open during the day, self-sterile, rather small, appearing near the stem tips, floral tube with imbricated fluffy scales, narrowly funnel-shaped, slightly zygomorphic, white, pollinated by bats. Fruits small, broad at the base, scales numerous and fleshy, retaining more or less the remains of the dried perianth. Seed elongated, shiny, blackish brown.
The monotypic genus Yungasocereus is endemic to Bolivia, and grows from approximately 1450 m up to 2550 m in altitude, in a hot and humid tropical area, in forests, the Yungas, which, in Aymara, means “Hot Lands”.
Bolivia (La Paz).
Currently only one recognised species:
– Yungasocereus inquisivensis* (Cardenas) F.Ritter 1980